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Application filed by Г.М. Шихутская, Г.М. ШихутскаfiledCriticalГ.М. Шихутская
Priority to SU89ApriorityCriticalpatent/SU64988A1/en
Application grantedgrantedCritical
Publication of SU64988A1publicationCriticalpatent/SU64988A1/en